Hi, rank tracker lately is busting enough placements. I find keywords that he points me in 4th position, but that there have never been (checking with the browser) and after 3 days he "realizes" and places them in the right positions, every time he tells me that keywords have come out of the top 50, but in reality they are always in their place ... can no longer give me the right placements for half of the keywords.

Have you tried to add specific location into the search engine settings? Under Preferences - Preferred search engines if you click Add custom you may set the preferred location for Google to see the results as they are seen from your place.